Question about Goodman GMS90703BXA Heater

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I have a goodman natural gas furnace model # gms950703bxa wont turn on replaced thermostat has power to unit but doesn't start and no red light what could be problem

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Check the on board fuse and make sure the transformer is putting out 24 volts

Posted on Mar 29, 2011

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1 Answer

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double check your wiring. R terminal on the furnace will provide 24 volts to the t-stat. W terminal in the t-stat will send 24 volts back to the furnace W terminal to turn on the heat. G terminal in the t-stat will send power to the G terminal in the furnace when the t-stat is switched to fan on. Y terminal in the t-stat will send power to the Y terminal in the furnace which in turn will send 24 volts to the A/C outside. The C terminal in the furnace should be connected to the c terminal in the A/C outside as well as to the T-stat. Check the fuse again

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